Radiator



June 19, 1951 E. G. POWELL HAL 2,557,760

RADIATOR Filed Sept, 16, 1947 4 Y 2 Sheets-Sheet l 6 m mzzmw ffirile qsPatented June 19, 1951 RADIATOR Ellis G. Powell, Oscar G. Johnson, andAlbert J. Olson, Michigan City, Ind., assignors to C. A. Dunham Company,a corporation of Iowa Application September 16, 1947, Serial No. 774,216

2 Claims. (Cl. 257-262.16)

This invention relates to radiators, and more particularly to animproved structure for holding radiator fins on a tube to increase theradiating surface and maintain a good conduction.

The primary object of the invention is to provide an improved radiatorwherein each of the fins has a tapered ferrule which is locked againstmovement by the wedging action of a small tongue provided on the nextadjacent ferrule.

A further object of the invention is to provide an improved fin whichhas a rectangular perimeter with rounded corners, and has its marginalportion offset from the body of the fin.

In the preferred construction, a ferrule is stamped in each fin to fitover the tube, and the wedging action of the small tongue of one fin,when the ferrules are forced together, causes a mating recess to beformed in the adjacent fin, so that good contact is maintained and thefin is locked against rotation with respect to the tube. By thisarrangement, the resiliency of the ferrule keeps a constant tensionbetween the ferrule and the tube, and this contact is maintained tightlyduring the expansion and contraction of the parts as the radiator isheated or permitted to cool. I

The invention is illustrated in a preferred embodiment in theaccompanying drawings, in which:

Figure 1 is an elevational view of a radiator embodying the invention;Fig. 2, a vertical sectional view, taken as indicated at line 2-2 ofFig. 1; Fig.3, a plan sectional view, taken as indicated at line 33 ofFig. 1; Fig. 4, an enlarged fragmentary plan sectional view, taken asindicated at line 4-4 of Fig. 3; Fig. 5, an elevational view of one ofthe fins; and Fig. 6, a side elevational view of one of the fins.

In the embodiment illustrated, a metal tube or pipe 1 is provided withthreaded ends 8 for connection with a piping system. A number ofradiating fins 9 are fitted tightly together on the pipe 1, to give thedesired length. Each of the fins preferably has a rectangular perimeterIll provided with rounded corners II. The outer marginal portion I2 isoffset forwardly from the main body of the fin and makes the fin quiterigid. A hole i3 is punched at the center of the fin to fit snuglyaround the pipe I. and a ferrule H extends forwardly. The ferrule has arounded base portion, as indicated at I5. Preferably, a fin for a 1%inch pipe has a radius of curvature of about a; of an inch.

As best shown in Fig. 6, the front edge of the ferrule I is providedwith a short forwardly extending tongue I6 whose forwardly extendingedges form an angle of about In a fin for a 1% inch pipe, the tongue ispreferably about of an inch in length.

To assemble the unit, the fins 9 are mounted on the pipe I and forcedtogether in a press so that, as indicated in Fig. 3, the tongue l6 willbe wedged between the tube and the forwardly adjacent ferrule. Thetongue will bend the ferrule slightly from a true circle and distort themetal as shown at ll. This causes a tight fit which locks the finagainst rotation with respect to the tube, and maintains a tight fitbetween the parts at all times. The front ferrule is welded to the pipe,as indicated at I8, and the rear ferrule is also welded, as indicated atl9.

It will be seen that the ferrule is relatively short, so that its sidewalls will not be cracked during the forming operation, and theelasticity of the metal will cause a close contact to be maintainedconstantly. After the adjacent tongue has been wedged into the concavityof the ferrule, the ferrule is placed under tension and the sideopposite from the tongue is pulled tightly against the tube.

The foregoing detailed description is given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, for some modifications will be obvious to those skilled intheart.

We claim:

1. A radiator comprising, a tube, and a plurality of metallic spacedradiating fins, each of said fins having an integral substantiallycylindrical resilient spacing ferrule mounted on said tube with a tightfit, each of said ferrules joining the web of its respective fin by arounded portion forming a fillet, the end edge of each ferrule away fromsaid fillet being in a plane parallel with the plane of its respectivefin web and serving as a spacing abutment to engage the fillet of thenext adjacent fin, said end edge of each ferrule having a single shortforwardly extending pointed tongue, the tongues of the assembled finsand ferrules each seating in an outwardly deformed pocket in the filletof the next adjacent fin, each of said pockets lying within the roundedportion of said fillet and falling short of the cylindrical portion ofthe ferrule, whereby the resiliency of each ferrule will cause it totightly grip against the outside of the tube for increased heatconduction contact.

2. A radiator as claimed in claim 1, in which the radius of each filletis of the order of a; of

an inch for a one and one-quarter inch tube.

and the forwardly extending edges of each Number tongue form an angle ofapproximately 60' and 1 63 no the tongue is approximately of an inch inlength for a one and one-quarter inch tube. 5 2 ELLIS G. POWELL. OSCARG. JOHNSON. ALBERT J. Olson. Number 10 23,227 REFERENCES CITED of 1903The following references are of record in the 3,026 of 1905 tile of thispatent:

4 tmrrxn sum mum's Heme Dete McIntyre June 28, 1927 Clarke July 4, 1mBecker In! 29. 1934 Young Feb. 26, 1935 FOREIGN PATENTS Country w DeteGreat Britain Oct. 27. 1003 Great Britain Nov. 23, 1905 Italy May 13,1932

